Found 2 books

Professional Android™ Wearables

[en] Professional Android™ Wearables Wrox Press

Ruiz, David Cuartielles & Göransson, Andreas

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Professional · Android™ Open Accessory Programming with Arduino™

[en] Professional · Android™ Open Accessory Programming with Arduino™ Prentice Hall PTR

Göransson, Andreas & Ruiz, David Cuartielles

download read it!